Beugge



(No Model.)

A. O. NAGEL, R. H. KAEMP & A. W. P. G. LINNENBRUGGE.

' DRIVING GEAR.

No. 335,832. Patented Feb. 9, 1886.

AUGUST CHRISTIAN NAGEL, REINHOLD HERMANN KAEMP, AND ADOLF "WILHELM FRANZGEORG LINNENBRI IGGE, OF HAMBURG, GERMANY, ASSIGNORS TO NAGEL AND KAEMP,OF SAME PLACE.

DRIVING-GEAR.

SPECIFICATION forming part of Letters Patent No. 335,832, dated February9, 1886.

Application filed December 2, 1885. Serial No. 184,447. (No model.)

To aZZ whom, it may concern:

Be it known that we, AUGUST CHRISTIAN NAGEL and RnrNHoLD HERMANN KAEMP,both citizens of the free State of Hamburg, and

ADOLF WILHELM FRANZ Gnone LINNEN- BRiiGGE, a subject of the King ofPrussia, all three residing in Hamburg, German Empire, have invented newand useful Improvements in Driving-Gears, of which the following is a lospecification.

Our invention relates to roller-mills and other machines having twoparallel shafts, provided each with a pulley for operating the same bymeans of a strap or other flexible powerconr 5 veying medium; andtheimprovements consistin arranging the said pulleys, which we shallcall the rollpnlleys, in different planes close to each other, and incombining therewith an oblique tension and guiding pulley adapted tolead the strap from one of the said roll-pulleys to the other.

Moreover, they consist in means for adj usting the position of thetension and guiding pulley in respect to the roll-pulleys, and incombining with the latter and the tension and.

guiding pulley a conical driving-pulley.

On the annexed sheet of drawings our improved driving-gear isrepresented in combination with the rolls of a roller-mill by Figare lin front elevation, by Fig. 2 in a sectional side view, and by Fig. 3 insectional plan. In the latter figure a portion of a second pair of rollsis shown. Fig. 4: is a guiding-pulley with section of a modifiedarrangement of the adjusting device. Fig. 5 represents a portion of thegear with conical driving-pulley. Fig. 6 is a view of the said conicalpulley. Fig. 7 shows the improved gear in different positions relativelyto the drivingpulley.

For the purpose of operating roller-mills solely by means of strapsvarious systems of driving-gear, in which tension and guiding pulleysare employed, have been contrived;

but all these systems present certain inconveniences. In many of themthe shaft carrying the driving-pulley requires to be placed in aparticular definite position in respect to the mill, usually verticallybelow the same, so

that these systems are not adapted for the transmission of power to themill from ashaft having a materiallydifferent position. In other casestwo straps are employed, one for transmitting motion from the maindrivingpulley to a counter-shaft or to one of the two 5 roll-pulleys,and another one for the transmission from the counter-shaft to bothroll-pulleys, or from one roll-pulley to the other, the latterstrapbeing conducted over a tension and guiding pulley, while the main strapis with out such pulley. This system, indeed, allows the maindriving-pulley to be arranged in any desirable position, but it rendersnecessary the use of at least five pulleys, while usually six areemployed.

A further disadvantage of all the existing systems is this, that theshafts of the two rolls are pressed by the driving-straps at theopposite ends against their bearings, and that these are consequentlycaused to wear out in such a manner that the parallelism of the rollsisinn paired.

Finally, it may be mentioned that in mills with two pairs of rolls thesaid pairs are usually so coupled by the straps that when from anyreason one pair has to be stopped it is impossible to work on with theother one.

By means of our improved system of driving-gear these disadvantages areobviated.

Referring to Figs. 1, 2,and 3,f and g are the two rollshafts, carryingat their ends, being on the same side of the machine, respectively, theroll-pulleys S and S which may be of like or different diameter. Thesepul1eys,being larger in diameter than the rolls, are placed 8 by theside of each other with a small space between them.

S is the driving-pulley,keyed on the line of shafting T, and d theguiding-pulley. From the driving-pulley S the strap runs to therollpulley S, thence over the guiding-pulley d, and from the same aroundthe second rollpulley,S,and back to the pulley S. The guiding-pulley clis placed in respect to the pulleys S and S obliquely in sucha mannerthat the strap coming from S will run properly upon the same, and thatas it leaves the pulley d it will likewise be cause "l' arun on thepulley S in the manner required in strap-gearing. The saidguiding-pulley d rotates on an axle mounted on an arm or carrier, 6, andwhich, on account of the described position of the pulley, is arrangedat an angle to the shafts f and g. Preferably this axle consists inapin, 0, made with a part, a, forming an angle with c, thesaid partbeing inserted into the carrier b in a position parallel to the shafts fand g, and having at its end a screw-thread with nut for securing it, sothat when the said nut is slackened the pin 0 may be turned on its part0 for the purpose of adjustment ofthe pulley d to the requisite angularposition in respect to the pulleys S and S Another mode of attachment ofthe pin 0 to the carrier b is shown by Fig. 4. In this case a sphericalcollar, h, is formed upon the pin 0, and its part c is arranged in aline with 0. The said collar engages in a recess in the carrier I),while on the end of the part cis placed a large washer, t, fitting to arecessed spherical boss on the carrier b. This arrangement allows thepin 0 to be adjustedwithin certain limits to any desired angle, while bymeans of the disposition described firstthe adj ustability of the pin islimited to its rotation on the surface of a cone having the center lineof the part c for its axis.

The carrier 1) is so constructed that it may be rotated about an axisparallel to the shafts f and g, or coinciding with one of them. Ac-

cording to the drawings, the said carrier is for this purpose made withan annular part, with which it is slipped on a flanged ring or circularbody, a, permanently fixed to the frame of the machine, and it issecured to the ring by a plate, a, adapted to press on the annular partof the carrier 1), and by screwbolts passed through the ring a and theplate a. When the nuts of the said bolts are slackened, the carrier bwith the pulley (I may be turned on the ring a, and the strap therebytightened, the said pulley being thus also made serviceable astension-pulley.

In respect to the co-operation of the driving-pulley S with the tworoll-pulleys S and S, which are placed by the side of each other, itrequires to be observed that the two strap parts passing, respectively,from S to S and from S to S do not run with their center lines (or theiredges) in a plane parallel to the planes of the pulleys. If the pulley Sis at a considerable distance from the pulleys S and S, this deviationof the strap parts from their true course may be counterbalanced and thedanger of the strap slipping off the pulleys avoided by making thepulley S sufficiently convex and by placing it witl its central planeopposite to the middle of the space between the pulleys S and S but ifthe distance of S from S and S is small, it is preferable to make thepulley S conical and to mount it on the driving-shaft so that it will beopposite to the pulley'S which is to receive the strap from S, and thatits largest diameter will be in a plane with the edgeof S that is turnedaway from S, as is shown by Fig. 5.. In consequence of this arrangementand the known tendency of a strap when passing around a conical pulleyto run toward the thicker end of the same the strap, leaving the pulleyS at an angle, and likewise running in an oblique direction upon S, willbe maintained on S during its course around this pulley, and it willthereupon run straight upon the pulley S". It is, however, advantageousto make the pulley S somewhat-wider than the other pulleys, and in thecase of the arrangement shown by Figs. 5 and 6 it is advisable toslightly bevel the pulley S at its thick end.

The advantages which the described drivinggear presents are First. Itallows the mill provided therewith to be placed in. any desired positionrelatively to the driving-shaft T, provided, of course, that theroll-shafts be parallel to the shaft T. This will be seen especiallyfrom Fig. 7.

Secondly. Separate straps, which are not kept tight by a tension-pulley,are avoided.

Thirdly. The number of pulleys is reduced as much as is at allpossible-i. a, to four.

Fourthly. The pull of the strap acting in I like direction and on likeends ofthe roll-shafts, the Wear of the bearings of the said shaftsresulting from such pull will not affect the parallelism of the rolls.

Fifthly. In mills with two pairs of rolls, as shown in Fig. 3, each pairmay be driven independentlyof the other one, so that either of them maybe stopped while the other pair continues to operate.

In the foregoing description the means for transmitting motion from thepulley S to the pulleys S and S has been supposed to be a strap. Insteadof the same, however, any other flexible and suitable power-transmittingmediumsuch as a rope or a plurality of parallel ropes-may be employed,provided only that the rims of the pulleys be formed in correspondingmanner, as is universally known.

To claim as our invention- 1. In machines having two parallel shafts, fand 9, provided at the like ends, respectively, with the pulleys S andS, arranged in different planes, the combination, with the said pulleysand a driving-pulley, S, of a tension and guiding pulley, d, placedobliquely to the pulleys S and S, and a strap or its describedequivalentrunning from the drivingpulley S over the pulleys S and S and the pulleyd, substantially as and for the purpose described.

2. The combination, with the parallel shafts f and .9, provided with thepulleys S and S arranged in different planes, the drivingpulley S, and astrap or its described equivalent, of a tension and guiding pulley, d,rotating on an axle that forms an angle with the shafts f and g, thesaid axle being mounted on a rotatively-adjustable carrier 12,substantially as specified.

3. The combination, with the parallel shafts our hands in the presenceof two subscribing f and provided with the pulleys S and S witnesses,arranged in different planes, a tension and AUGUST CHRISTIAN NAGEL.guiding pulley, d, placed obliquely to the pul- REINHOLD HERMANN KAEMP.5 leys S and S and a strap running over the ADOLF WILHELM FRANZ GEORGLINNENBRUGGE.

said pulleys, of a conical driving-pulley, S, as WVitnesses: and for thepurpose set forth. WILHELM FANTZEN,

In testimony whereof we have hereunto set GEORG WILHELM THEODOR GEHRKE.

